1 / 11

Water & Sediment Control Basin (WASCOB) Mike Cox State Conservation Engineer

Water & Sediment Control Basin (WASCOB) Mike Cox State Conservation Engineer. Contractor Certification Training March 2008. Water & Sediment Control Basin (638). Purpose: 1) Reduce gully erosion 2) Trap Sediment 3) Reduce and manage downstream runoff.

ilouis
Download Presentation

Water & Sediment Control Basin (WASCOB) Mike Cox State Conservation Engineer

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Water & Sediment Control Basin (WASCOB) Mike Cox State Conservation Engineer Contractor Certification Training March 2008

  2. Water & Sediment Control Basin (638) • Purpose: 1) Reduce gully erosion • 2) Trap Sediment • 3) Reduce and manage downstream runoff • WASCOBs are typically used when drainage areas are smaller. • WASCOB Spacing is to reduce slope length and accommodate equipment width

  3. Farmed - WASCOB • Slopes are flatter (5:1 to 10:1) • More yardage must be used during construction • Harder to fit into steep areas

  4. Grassed - WASCOB • Slopes are steeper (3:1 to 5:1) • Less yardage used during construction • Fits better into steep areas • Slopes steeper than 5:1 must be grassed

  5. Compaction of Earth Fill • Use 6-9” Lifts • Dozer or Loaded Pan on Each Lift – 2 passes • Sheepsfoot Roller – 1 pass

  6. Borrow Areas • Don’t get borrow at the channel • Unless plans call for the channel to be excavated • Borrow should come from field above • Remember to stockpile topsoil

  7. Outlets for WASCOBs • Underground Outlet (620) • Outlet tile is sized per orifice diameter • Orifice plates must be installed

  8. Risers • Must be minimum of 2.5’ in height

  9. Installation Report http://www.in.nrcs.usda.gov/technical/engineering/engineering.html Look Under Contractor Certification Section

  10. Helping People Help the Land

More Related